1634-98-382: Introduction to Programming Using JavaScript

#Question

To convert values to a boolean, which method can you use?

A.

Boolean()

B.

isTrue()

C.

toBoolean()

D.

all of the above

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Correct Answer: A

The Boolean() function converts a value to a boolean type, returning true or false based on the value's truthiness.

98-382: Introduction to Programming Using JavaScript

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To convert values to a boolean, which method can you use?

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#Question

If you want to pause further execution of a function in JavaScript, which keyword should be used?

A.

await

B.

stop

C.

wait

D.

pause

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Correct Answer: A

The await keyword is used to pause execution until a promise is settled, allowing for easier reading and handling of asynchronous code.

98-382: Introduction to Programming Using JavaScript

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If you want to pause further execution of a function in JavaScript, which keyword should be used?

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#Question

Which method provides the ability to handle promises when any of them are resolved or rejected?

A.

Promise.any()

B.

Promise.all()

C.

Promise.complete()

D.

Promise.race()

Reveal answer Discussion

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Correct Answer: D

Promise.race() will return a promise that resolves or rejects as soon as one of the promises in the iterable resolves or rejects, with its value or reason.

98-382: Introduction to Programming Using JavaScript

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Which method provides the ability to handle promises when any of them are resolved or rejected?

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#Question

To copy an array without affecting the original array, which technique will she use?

A.

both B and C

B.

var newArray = oldArray

C.

var newArray = oldArray.slice()

D.

var newArray = [...oldArray]

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Correct Answer: A

Both the spread operator and the slice() method will create a new copy of the array without modifying the original.

98-382: Introduction to Programming Using JavaScript

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To copy an array without affecting the original array, which technique will she use?

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#Question

If Maria wants to restrict an object from having new properties added, which method should she use?

A.

Object.preventExtensions()

B.

Object.seal()

C.

Object.defineProperty()

D.

Object.freeze()

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Correct Answer: A

Using Object.preventExtensions() prevents new properties from being added to an object, allowing existing properties to be modified or removed.

98-382: Introduction to Programming Using JavaScript

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If Maria wants to restrict an object from having new properties added, which method should she use?

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#Question

Julia wants to remove a specific index from an array. What method should she use?

A.

deleteAt()

B.

remove()

C.

exclude()

D.

splice()

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Correct Answer: D

The splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.

98-382: Introduction to Programming Using JavaScript

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Julia wants to remove a specific index from an array. What method should she use?

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#Question

To bind a function to a specific context, which method can be employed?

A.

link()

B.

attach()

C.

set()

D.

bind()

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Correct Answer: D

The bind() method creates a new function that, when called, has its this keyword set to the provided value, with a given sequence of arguments preceding any provided when the new function is called.

98-382: Introduction to Programming Using JavaScript

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To bind a function to a specific context, which method can be employed?

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